Use of fuzzy logic for networks selection in heterogeneous wireless environment

Two proposals are presented in this study in an attempt to solve the problem of network selection, which are based on fuzzy logic techniques and methods of decision making. The first proposal uses a combination of the fuzzy method with two MADM (Multiple Attribute Decision Making) methods, the AHP (Analytic Hierarchy Process) and the GRA (Grey Relational Analysis), whereas the latter uses only the fuzzy logic technique. The two are compared with each other and with a third proposal, which uses a combination of AHP method along with a cost function. The results show that the two proposals presented in this paper are more efficient to sort and select the best access network compared to the third one.